Mary Kennedy, from whom Robert F. Kennedy Jr. filed for divorce in 2010, is dead, said an employee of the Westchester County, New York, medical examiner's office on Wednesday.

The employee, who declined to give his name, told CNN he would provide no further details about the manner and cause of death.

The family released a statement saying, "We deeply regret the death of our beloved sister Mary, whose radiant and creative spirit will be sorely missed by those who loved her. Our heart goes out to her children who she loved without reservation."

The Bedford (New York) Police Department earlier confirmed they were investigating a possible unattended death at 326 South Bedford Road, an address owned by Robert F. Kennedy Jr.

Authorities found a deceased individual inside "an out building" on the property, police said in a statement.